Ignition-lighting generator



1954 P. HARSCH ETAL IGNITION-LIGHTING GENERATOR 2 Sheets-Sheet 1 Filed Oct. 24, 1950 IN VEN TORS i Pnuz. HARscH mm Q U QI/YKEL g- 31, 1954 P. HARSCH EIAL IGNITION-LIGHTING GENERATOR 2 Sheets-Sheet 2 Filed Oct. 24, 1950 Patented Aug. 31, 1954 IGNITION-LIGHTING GENERATOR Paul Harsch, Nurnberg-Reichelsdorf, and Franz Germany, assignors to Noris Zlind A. G., Nurnberg, Germany Application October 24, 1950, Serial No. 191,829

Rinkel, Nurnberg,

Claims priority, application Germany August 8, 1950 8 Claims.

This invention relates to a flywheel ignitionlighting generator for internal combustion engines of the type used, e. g., in motor vehicles with lighting installation, and in which the rotor has ring-shaped permanent magnets and the stator apart from the break and the appertaining condenser has a sparking coil and a lighting coil.

According to the present invention in such flywheel ignition-lighting generators means are provided by which the primary current of the single sparking coil is interrupted twice with each rotation of the rotor. According to the invention this may be achieved, e. g., by providing on the rotary shaft of the rotor a double cam controlling the break. Instead of the double cam a single cam may be provided, if, e. g., the break instead of one hammer as usual has two opposite hammers which are mechanically coupled with each other in such a way that each of them when sliding over the cam causes interruption of the primary current.

The said twofold interruption of the primary current during one revolution of the rotor has a very surprising effect, i. e., the electric output supplied from the lighting coil of the flywheel ignition-lighting generator is substantially increased although the conductors of the ignition circuit apart from the common ground line are entirely separate from the lighting circuit. This surprising. effect may be attributed to the fact that during the closing of the primary current in the ignition circuit there is produced a concen tration of the lines of magnetic force at the sparking coil side. of the generator thus sucking off lines of force from the lighting current part on the opposite side thereof, and that when the primary current of the sparking coil system is interrupted, the lines of force are displaced towards the lighting coil side of the generator. It will be understood that this. effect is increased in case of a twofold interruption of the sparking coil current, resulting in said increased output of the lighting current part of the machine. It will be noted inthis connection that the increase of the output of the lighting part of the generator does not cause a reduction of the electric output produced in the sparking coil part. thereof. A particularly favorable embodiment of the invention will be obtained if the rotor of the generator has four symmetrically spaced permanent magnets and the sparking coil is arranged coaxially to the lightiig coil. In this arrangement the coils are advantageously arranged in such a manner that the cores during the rotation of the permanent magnets always are bridging two different pairs of poles of the permanent magnets 2 simultaneously. This will be the case if the ends of the cores of the coils are disposed on the corners of a square.

In a flywheel type ignition-lighting generator constructed in this manner there remains sumcient space between the sparking coil aggregate and the lighting coil for accommodating the break with its appertaining condenser in the interspace, as known per se.

The flywheel type ignition lighting generator as herein described will be usedwith special success in two-cylinder internal combustion engines, i. e., more particularly in engines in which the pistons of the two cylinders are moved in opposite directions, after the push-pull or counterstroke principle. In this case one ignition is due with each half revolution of the rotor, i. e., in the very rythm in which the primary current is interrupted and the ignition voltage for the spark plugs is produced according to the present invention. The ignition voltage is supplied to the spark plugs from the secondary coil of the sparking coil aggregate.

In this case it was found to be of advantage to subdivide this secondary coil winding into two single windings whereby a more perfect insulation of the secondary coil is achieved. The ends of the single windings are each connected to one spark plug while the coils are interconnected in the middle. True, always one of the two spark plugs in this arrangement remains without effect upon the output of the internal combustion engine, since it is ignited in the moment where the piston has just exhausted or scavenged the combustion gases. However, these blank sparks are without any disadvantage for the engine while the advantage of the increased output of the lighting generator becomes fully effective. Also internal combustion engines with synchronously moved pistons can be fitted with the ignition system according to the present invention. In this case there are produced effective sparks in both cylinders simultaneously in one ignition phase while the following ignition phase remains ineffective for both of the cylinders.

It will be understood that the same construction or system can also be used in single cylinder engines. Here again each second sparking remains ineffective, while the increase of the output of the lighting generator is maintained.

Other and further objects, features and advantages of the invention will be pointed out hereinafter andv appear in the appended claims forming part of the application.

In the accompanying drawing a now preferred embodiment of the invention is shown by way of illustration and not by way of limitation.

Fig. 1 is a plan view of a flywheel ignitionlighting generator having the invention applied thereto, the carrier plate for the coils bein omitted,

Fig. 2 is a cross section on the horizontal center line of Fig. 1,

Fig. 3 is a diagram of connection of the ignition current plant,

Fig. 4 is a plan view of the flywheel ignitionlighting generator with the carrier plate for the coils being omitted, same as in Fig. l, but including a subdivided secondary coil,

Fig. 5 is a diagram of connection of an ignition current plant with the secondary coil being subdivided.

Similar reference numerals denote similar parts in the different views.

Referring now to the drawings in greater detail it will be seen that the rotor of the flywheel ignition-lighting generator substantially comprises a ring I arranged parallel to the axis of rotation, said ring consisting of a magnetizable material on which are arranged four inwardly directed permanent magnets 2, 3, 4-, 5. The ring I forms part of a pot-shaped casing 6 having in its center a sleeve I through which the casing 6 together with the ring I and the magnets 2, 3, 4, 5 is fixedly connected to the rotary shaft 8, which may form an extension of the crank shaft of the internal combustion engine or may be coupled directly thereto as a separate component. The permanent magnets 2 to 5 consist of a high class permanent magnetic steel and are provided with pole shoes 2', 3', 4, 5'. On the plate 9 which is stationarily mounted are secured the ignition coil Iii, lighting coil I I, breaker I2 and condenser I3. Each of the coil systems I!) and II comprises an interior core I4 or I5 of a laminated soft iron material, each of these cores having on both sides pole shoes I4 and I5.

The lighting coil II has one winding only from which the current induced therein is supplied through the switch It to the lamps II, only one of which is shown in Fig. l.

The ignition current coil ID on the other hand consists of a primary coil I8 as known per se and a secondary coil I9 having many turns. The high tension current induced therein is supplied, at

the point of time determined by operation of the breaker I2, to the spark plug 20, producing therein the ignition spark required for igniting the gas mixture. The control of the break I2 according to the invention is effected in such a manner that the primary current is interrupted twice with each revolution of the shaft 8, by the sliding of the hammer 2| of the break over the double cam 22 mounted on the shaft 8, with the result that by the doubling of the numberof interruptions the output of the lighting generator is considerably increased. The interruptions in this case are taking place at the point of break 23, since the contacts at this point are disengaged from each other by action of the hammer 2 I.

Where a two-cylinder combustion engine is in question which accordingly has two spark plugs, the secondary coil I9 is advantageously subdivided into two windings i9 and I9" each of which has associated to it one spark plug (see Figs. 4 and 6).

The high tension for the spark plug is drawn from the connecting points or terminals 24 and 25 of the winding I9 and I9. The cross sectional illustration of the embodiment shown in Fig. 4 is identical with that shown in Fig. 2 since the subdivision of the secondary coil into single coils is not visible in the cross section.

As will be seen from the figures, the pole pieces I4 and I5 in case of the use of a rotor with four symmetrically spaced permanent magnets are disposed on the corners of a square. By rotation of the rotor the cores I4 and I5 of these permanent magnets always bridge simultaneously two pairs of permanent magnets 2, 3 on the one hand, and 4, 5 on the other hand, or 3, 4 on the one hand, and 5, 2 on the other hand, so that the maximum induction in the iron cores I l, I5 will always occur simultaneously.

It will also be seen from the figures that the breaker I2 and the condenser I3 are inserted between the coils IG and i5 (see Figs. 1 and 4), whereby a particularly favorable utilization of the space is achieved.

While the invention has been described in detail with respect to a-now preferred example and embodiment of the invention it will be understood by those skilled in the art after understanding the invention that various changes and modifications may be made without departing from the spirit and scope of the invention and it is intended, therefore, to cover all such changes and modifications in the appended claims.

What is claimed is:

1. An electric generator for supplying the igniting voltage and the lighting current for selfpropelled vehicles, comprising in combination, a rotor consisting of ferromagnetic material and formed as a flywheel, said rotor having a plurality of radially arranged permanent magnets having alternately arranged north and south poles; a stator carrying two ferromagnetic core members bridging in any position of said rotor with respect to said stator one of said north poles and respect to said one of said north poles; first winding means arranged on one of said tWo core members for supplying the igniting voltage; means connected to said stator for interrupting the current induced by said permanent magnets in said first winding means; means arranged diametrically opposite to each other with respect to the axis of said rotor actuated by said rotor for actuating said interrupting means twice for every full rotation of said rotor; and second winding means arranged on the other of said two core members for supplying the lighting current,

whereby said second winding means has a large bridging in any position of said rotor with respect to said stator one of said north poles and one of said south poles arranged alternately with respect to said one of said north poles; first winding means arranged on one of said two core members for supplying the igniting voltage; means connected to said stator for interrupting the current induced by said permanent magnets in said first winding means; a shaft rigidly connected to said rotor; two cam means arranged on said shaft for actuating said interrupting means twice for every full rotation of said rotor; and second winding means arranged on the other of said two core members for supplying the lighting current,

alternately arranged northand south poles; a

stator carrying two ferromagnetic core members bridging in any position of said rotor with respect to said stator one of said north poles and one of said south poles arranged. alternately with respect to said one of said north poles; first winding means arranged on one of said two core members for supplying theigniting voltage; means connected to said stator forinterrupting the current induced by said permanent magnets in said first winding means; ashaft rigidly connected to said rotor; two a cam means arranged diametrically opposite to each other on said shaft for actuating said interrupting means twice for every full rotation of said rotor; and second winding means arranged on the other of said two core members for supplying the lighting current, whereby said second winding means has a large output unaffected by said interrupting means for the current in said first winding means.

4. An electric generator for supplying the igniting voltage and the lighting current for selfpropelled vehicles, comprising in combination, a rotor consisting of ferromagnetic material and formed as a flywheel, said rotor having a plurality of radially arranged permanent magnets having alternately arranged north and south poles; a stator carrying two ferromagnetic core members bridging in any position of said rotor with respect to said stator one of said north poles and one of said south poles arranged alternately with respect to said one of said north poles; a first winding means arranged on one of said two core members; a secondary winding arranged on said one of said two core members and cooperating with said first winding means, said secondary winding serving for supplying the igniting voltage; means connected to said stator for interrupting the current induced by said permanent magnets in said first winding means; means actuated by said rotor for actuating said interrupting means after equal intervals of time twice for every full rotation of said rotor; and second winding means arranged on the other of said two core members for supplying the lighting current, whereby said second winding means has a large output unaffected by said interrupting means for the current in said first winding means.

5. An electric generator for supplying the igniting voltage and the lighting current for selfpropelled vehicles, comprising in combination, a rotor consisting of ferromagnetic material and formed as a flywheel, said rotor having a plurality of radially arranged permanent magnets having alternately arranged north and south poles; a stator carrying two ferromagnetic core members bridging in any position of said rotor with respect to said stator one of said north poles and one of said south poles arranged alternately with respect to said one of said north poles; a first winding means arranged on one of said two core members; a secondary winding arranged on said one of said two core members and cooperating with said first winding means, said secondary winding serving for supplying the igniting voltage; means connected to said stator for interrupting the current induced. by said permanent magnets insaid first winding means; a shaft rigidly connected to said rotor; two cam means arranged diametrically opposite to each other on said shaft fo actuating said interrupting means twice for every full rotation of said rotor; and second winding means arranged on the other of said two core members for supplying the lighting current, whereby said second windingmeans has a large output unaffected by said interrupting means for the current in said first winding means.

6. An electric generator for supplying the igniting voltage and the lighting current for selfpropelled vehicles, comprising in combination, a rotor consisting of ferromagnetic material and formed as a flywheel, said rotor having a plurality of radially arranged permanent magnets having alternately arranged north and south poles; a stator carrying two ferromagnetic core members bridging in any position of said rotor with respect to said stator one of said north poles and one of said south poles arranged alternately with respect to said one of said north poles; a first winding means arranged on one of said two core members; a secondary winding arranged on said one of said two core members and cooperating with said first winding means, said secondary winding serving for supplying the igniting voltage; means connected to said stator for interrupting the current induced by said permanent magnets in said first winding means; a condenser connected in parallel with said interrupting means; a shaft rigidly connected to said rotor; two cam means arranged diametrically opposite to each other on said shaft for actuating said interrupting means twice for every full rotation of said rotor; and second winding means arranged on the other of said two core members for supplying the lighting current, whereby said second Winding means has a large output unaffected by said interrupting means for the current in said first winding means.

7. An electric generator for supplying two igniting voltages and the lighting current for self-propelled vehicles, comprising in combination, a. rotor consisting of ferromagnetic material and formed as a flywheel, said rotor having a plurality of radially arranged permanent magnets having alternately arranged north and south poles; a stator carrying two ferromagnetic core members bridging in any position of said rotor with respect to said stator one of said north poles and one of said south poles arranged alternately with respect to said one of said north poles; a first winding means arranged on one of said two core members; a first secondary winding and a second secondary winding, said secondary windings being both arranged on said one of said two core members and cooperating with said first winding means, said secondary windings serving for supplying the igniting voltages; a spool carrying said secondary windings; means connected to said stator for interrupting the current induced by said permanent magnets in said first winding means; a shaft rigidly connected to said rotor; two cam means arranged diametrically opposite to each other on said shaft for actuating said interrupting means twice for every full rotation of said rotor; and second winding means arranged on the other of said two core members for supplying the lighting current, whereby said second winding means has a large output unaffected by said interrupting means for the current in said first winding means.

8. An electric generator for supplying two igniting voltages and the lighting current for selfpropelled vehicles, comprising in combination, a rotor consisting of ferromagnetic material and formed as a flywheel, said rotor having a plurality of radially arranged permanent magnets having alternately arranged north and south poles; a stator carrying two ferromagnetic core members bridging in any position of said rotor with respect to said stator one of said north poles and one of said south poles arranged alternately with respect to said one of said north poles; a first winding means arranged on one of said two core members; a first secondary winding and a second secondary winding, said secondary windings being both arranged on said one of said two core members and cooperating with said first winding means, said secondary windings serving for supplying the igniting voltages; a

spool carrying said secondary windings; means 20 said first winding'means; a condenser connected in parallel with said interrupting means; a shaft rigidly connected to said rotor; two cams arranged diametrically opposite to each other on said shaft for actuating said interrupting means twice for every full rotation of said rotor; and second winding means arranged on the other of said two core members for supplying the lighting current, whereby said second winding means has a large output unaffected by said interrupting means for the current in said first winding means.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,010,211 Alston Nov. 28, 1911 1,140,993 Mason May 25, 1915 1,224,247 Wacherk May 1, 1917 1,274,115, Warren July 30, 1918 1,331,998 Neuland Feb. 24, 1920 

